What issue arises by using the phase-to-common-ground method?

The phase-to-common-ground method is primarily used in electrical systems for grounding purposes. One significant issue with this approach is that while it can help stabilize the voltage levels in a system and reduce electromagnetic interference, it does not effectively eliminate ground faults. Ground faults occur when there is an unintended connection between a phase conductor and the ground, which can lead to safety hazards and equipment damage.

Using phase-to-common-ground might provide a reference point for voltages in the system, but it does not provide a reliable mechanism to detect and clear ground faults quickly. Instead, ground faults can still propagate through the system, increasing the risk of electrical shock or equipment failure.

In contrast, other methods of grounding, such as comprehensive grounding systems, can detect faults more effectively and provide more robust protection against these faults. Therefore, the concern that the phase-to-common-ground method fails to eliminate ground faults is a critical issue in electrical safety and system reliability.